swift - GameOver Showing Interstitial Ad 后，场景回到 WelcomeScene

Question

我有一个 sprite kit 游戏，我想在游戏结束时展示插页式广告。好吧，我可以在游戏结束后使用 NotificationCenter 显示广告，但问题是当我关闭广告时，它会返回到 WelcomeScene。我想在关闭广告后返回到 GameOverScene，但如何？GameViewController.swift

import UIKit
import SpriteKit
import GameplayKit
import GoogleMobileAds

class GameViewController: UIViewController , GADInterstitialDelegate {


var interstitialAds : GADInterstitial!


override func viewDidLoad() {
    super.viewDidLoad()



    createAndLoadAd()
    NotificationCenter.default.addObserver(self, selector: #selector(GameViewController.showAds), name: NSNotification.Name("notification"), object: nil)


}


func createAndLoadAd(){
    let request = GADRequest()
    let interstitial = GADInterstitial(adUnitID: "ca-app-pub-3940256099942544/4411468910")
    request.testDevices = [kGADSimulatorID]
    interstitial.delegate = self
    interstitial.load(request)
    interstitialAds = interstitial
}

func showAds(){

    if interstitialAds.isReady {
        interstitialAds.present(fromRootViewController: self)
    }
}

func interstitialDidDismissScreen(_ ad: GADInterstitial) {
    createAndLoadAd()
}


override var shouldAutorotate: Bool {
    return true
}

override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    if UIDevice.current.userInterfaceIdiom == .phone {
        return .allButUpsideDown
    } else {
        return .all
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Release any cached data, images, etc that aren't in use.
}

override var prefersStatusBarHidden: Bool {
    return true
}

override func viewWillLayoutSubviews() {

    super.viewWillLayoutSubviews()

    let menu = Menu()
    let skView = self.view as! SKView

    skView.ignoresSiblingOrder = true

    menu.size = view.bounds.size
    menu.scaleMode = SKSceneScaleMode.resizeFill
    skView.presentScene(menu)


}

游戏场景.swift

    func gameOver(){

    NotificationCenter.default.post(name: NSNotification.Name("notification"), object: nil)

    //reset everything
    self.run(SKAction.playSoundFileNamed("Sound/die.wav", waitForCompletion: false))
    hud.updateScore(score: Int(score))


    player.die()
    hud.showScore()
    hud.showRestartMenu()



}   

HUD.swift

    import SpriteKit

    class HUD : SKNode {
    var scoreLabel = SKLabelNode(text: "0")
    let restartBut = SKSpriteNode()
    let menuBut = SKSpriteNode()
    let highScoreLabel = SKLabelNode()

    func createNode(screenSize : CGSize){

    scoreLabel.fontName = "AppleSDGothicNeo-SemiBold"
    scoreLabel.position = CGPoint(x: (screenSize.width / 2) - (screenSize.width / 4 * 2) , y: (screenSize.height / 2) - 50)
    scoreLabel.fontColor = UIColor.black
    scoreLabel.fontSize = 40
    scoreLabel.horizontalAlignmentMode = SKLabelHorizontalAlignmentMode.center
    scoreLabel.verticalAlignmentMode = SKLabelVerticalAlignmentMode.center
    scoreLabel.zPosition = 50
    self.addChild(scoreLabel)

     //Restart and Menu button
    restartBut.texture = SKTexture(imageNamed: "restartButton")
    restartBut.name = "restartButton"
    restartBut.position = CGPoint(x: 0, y: 0)
    restartBut.zPosition = 50
    restartBut.size = CGSize(width: 400, height: 400)

    menuBut.texture = SKTexture(imageNamed: "menuButton")
    menuBut.name = "menuButton"
    menuBut.position = CGPoint(x: 0, y: -300)
    menuBut.zPosition = 50
    menuBut.size = CGSize(width: 150, height: 150)

    highScoreLabel.fontName = "AppleSDGothicNeo-SemiBold"
    highScoreLabel.position = CGPoint(x: 0, y: 450)
    highScoreLabel.fontColor = UIColor.black
    highScoreLabel.fontSize = 45
    highScoreLabel.horizontalAlignmentMode = SKLabelHorizontalAlignmentMode.center
    highScoreLabel.verticalAlignmentMode = SKLabelVerticalAlignmentMode.center
    highScoreLabel.zPosition = 50
    }

    func showRestartMenu(){

    restartBut.alpha = 0
    menuBut.alpha = 0
    highScoreLabel.alpha = 0

    self.addChild(restartBut)
    self.addChild(menuBut)
    self.addChild(highScoreLabel)

    restartBut.run(SKAction.fadeAlpha(to: 1, duration: 0.35))
    menuBut.run(SKAction.fadeAlpha(to: 1, duration: 0.35))
    highScoreLabel.run(SKAction.fadeAlpha(to: 1, duration: 0.35))





    }

    func updateScore(score : Int){
    var highScore = UserDefaults().integer(forKey: "highScore")
    let number = NSNumber(value: score)
    let formatter = NumberFormatter()

    if let scoreText = formatter.string(from: number){
        scoreLabel.text = scoreText
    }




    if Int(score) > highScore {
        highScore = Int(score)
        highScoreLabel.text = NSString.init(format: "Highscore : %i", highScore) as String

        let highScoreDefs = UserDefaults.standard
        highScoreDefs.set(highScore, forKey: "highScore")
        highScoreDefs.synchronize()

    }

    highScoreLabel.text = "Highscore : \(highScore)"

}

Answer 1

转到您的 GameViewController 并将所有代码从 ViewWillLayoutSubviews 移到 ViewDidLoad 中。 ViewDidLoad 仅在 GameViewController 加载时调用一次。另一方面，ViewWillLayoutSubviews 可以被调用多次，比如当您的广告显示时，它会再次加载您的 MenuScene。

作为一个提示，您应该将通知键放入扩展中以避免拼写错误，并且作为一种良好做法，请更具体地使用名称。

所以将它添加到任何类之上或在新的 swift 文件中

extension Notification.Name {
    static let showAd = Notification.Name("ShowAdNotification")
}

比起你可以改变你的观察者

NotificationCenter.default.addObserver(self, selector: #selector(showAds), name: .showAd, object: nil)

NotificationCenter.default.post(name: .showAd, object: nil)

如果你想要一个更干净、更可重用的解决方案，你也可以在 GitHub 上查看我的助手。

https://github.com/crashoverride777/SwiftyAds

我还注意到您在 GameViewController 缩放模式中使用了 .resizeFill。你不应该这样做，你的游戏在每台设备上看起来都不一样，这将是一场噩梦。您应该使用默认的 scaleMode .aspectFill，这通常是最佳设置。

您还应该给场景一个固定的大小，而不是根据 View 的边界 (view.bounds.size) 调整它的大小。

How to make SKScene have fixed width?

How do I size sprites in a universal sprite kit game

希望对你有帮助